1 #ifndef __DALI_CAMERA_ACTOR_H__
2 #define __DALI_CAMERA_ACTOR_H__
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
21 #include <dali/public-api/actors/actor.h>
23 namespace Dali DALI_IMPORT_API
26 namespace Internal DALI_INTERNAL
35 * @brief Type determines how camera operates.
39 FREE_LOOK, ///< Camera orientation is taken from CameraActor
40 LOOK_AT_TARGET, ///< Camera is oriented to always look at a target
44 * @brief Projection modes.
48 PERSPECTIVE_PROJECTION, ///< Distance causes foreshortening; objects further from the camera appear smaller
49 ORTHOGRAPHIC_PROJECTION, ///< Relative distance from the camera does not affect the size of objects
55 * @brief Controls a camera.
57 * Allows the developer to use actor semantics to control a camera.
59 * There are two types of camera actor, FREE_LOOK and LOOK_AT_TARGET. By default
60 * the camera actor will be FREE_LOOK.
62 * A FREE_LOOK camera uses actor's rotation to control where the camera is looking.
63 * If no additional rotations are specified, the camera looks in the negative Z direction.
65 * For LOOK_AT_TARGET the actor's rotation is ignored, instead the camera looks at TARGET_POSITION
66 * in world coordinates.
69 class CameraActor : public Actor
73 // Default Properties; additional to Actor properties
74 static const Property::Index TYPE; ///< Property::STRING, // "type" // Not animatable
75 static const Property::Index PROJECTION_MODE; ///< Property::STRING, // "projection-mode" // Not animatable
76 static const Property::Index FIELD_OF_VIEW; ///< Property::FLOAT, // "field-of-view" // Not animatable
77 static const Property::Index ASPECT_RATIO; ///< Property::FLOAT, // "aspect-ratio" // Not animatable
78 static const Property::Index NEAR_PLANE_DISTANCE; ///< Property::FLOAT, // "near-plane-distance" // Not animatable
79 static const Property::Index FAR_PLANE_DISTANCE; ///< Property::FLOAT, // "far-plane-distance" // Not animatable
80 static const Property::Index LEFT_PLANE_DISTANCE; ///< Property::FLOAT, // "left-plane-distance" // Not animatable
81 static const Property::Index RIGHT_PLANE_DISTANCE; ///< Property::FLOAT, // "right-plane-distance" // Not animatable
82 static const Property::Index TOP_PLANE_DISTANCE; ///< Property::FLOAT, // "top-plane-distance" // Not animatable
83 static const Property::Index BOTTOM_PLANE_DISTANCE; ///< Property::FLOAT, // "bottom-plane-distance" // Not animatable
84 static const Property::Index TARGET_POSITION; ///< Property::VECTOR3, // "target-position" // Not animatable
85 static const Property::Index PROJECTION_MATRIX; ///< Property::MATRIX, // "projection-matrix" // Constraint input, not animatable
86 static const Property::Index VIEW_MATRIX; ///< Property::MATRIX, // "view-matrix" // Constraint input, not animatable
87 static const Property::Index INVERT_Y_AXIS; ///< Property::BOOLEAN, // "invert-y-axis" // Not animatable
90 * @brief Create an uninitialized CameraActor handle.
92 * Initialise it using CameraActor::New(). Calling member functions
93 * with an uninitialized Dali::Object is not allowed.
98 * @brief Create a CameraActor object.
100 * Sets the default camera perspective projection for the stage's size. @see SetPerspectiveProjection().
101 * @return the newly created camera actor.
103 static CameraActor New();
106 * @brief Create a CameraActor object.
108 * Sets the default camera perspective projection for the given canvas size. @see SetPerspectiveProjection().
110 * @param[in] size The canvas size.
111 * @return the newly created camera actor.
113 static CameraActor New( const Size& size );
116 * @brief Downcast an Object handle to CameraActor.
118 * If handle points to a CameraActor the downcast produces valid
119 * handle. If not the returned handle is left uninitialized.
120 * @param[in] handle to An object
121 * @return handle to a CameraActor or an uninitialized handle
123 static CameraActor DownCast( BaseHandle handle );
128 * This is non-virtual since derived Handle types must not contain data or virtual methods.
133 * @copydoc Dali::BaseHandle::operator=
135 using BaseHandle::operator=;
138 * @brief Set the camera type.
139 * The default type is Dali::Camera::FREE_LOOK
140 * @param[in] type The camera type
142 void SetType( Dali::Camera::Type type );
145 * @brief Get the type of the camera.
147 * @return the type of camera
149 Dali::Camera::Type GetType() const;
152 * @brief Set the projection mode.
154 * @param[in] mode One of PERSPECTIVE_PROJECTION or ORTHOGRAPHIC_PROJECTION
156 void SetProjectionMode( Dali::Camera::ProjectionMode mode );
159 * @brief Get the projection mode.
161 * @return One of PERSPECTIVE_PROJECTION or ORTHOGRAPHIC_PROJECTION
163 Dali::Camera::ProjectionMode GetProjectionMode() const;
166 * @brief Set the field of view.
168 * @param[in] fieldOfView The field of view in radians
170 void SetFieldOfView( float fieldOfView );
173 * @brief Get the field of view in Radians.
175 * The default field of view is 45 degrees
176 * @return The field of view in radians
178 float GetFieldOfView( );
181 * @brief Set the aspect ratio.
183 * @param[in] aspectRatio The aspect ratio
185 void SetAspectRatio( float aspectRatio );
188 * @brief Get the aspect ratio of the camera.
190 * The default aspect ratio is 4.0f/3.0f
191 * @return the aspect ratio
193 float GetAspectRatio( );
196 * @brief Sets the near clipping plane distance.
198 * @param[in] nearClippingPlane distance of the near clipping plane
200 void SetNearClippingPlane( float nearClippingPlane );
203 * @brief Get the near clipping plane distance.
205 * The default near clipping plane is 800.0f, to match the default screen height
206 * Reduce this value to see objects closer to the camera
207 * @return the near clipping plane value
209 float GetNearClippingPlane( );
212 * @brief Sets the far clipping plane distance.
214 * @param[in] farClippingPlane distance of the far clipping plane
216 void SetFarClippingPlane( float farClippingPlane );
219 * @brief Get the far clipping plane distance.
221 * The default value is the default near clipping plane + (0xFFFF>>4)
222 * @return the far clipping plane value
224 float GetFarClippingPlane( );
227 * @brief Set the target position of the camera.
229 * @pre Camera type is LOOK_AT_TARGET
230 * @param[in] targetPosition The position of the target to look at
232 void SetTargetPosition( const Vector3& targetPosition );
235 * @brief Get Camera Target position.
237 * The target position is Vector3::ZERO
238 * @pre Camera type is LOOK_AT_TARGET
239 * @return The target position of the camera
241 Vector3 GetTargetPosition() const;
244 * @brief Request for an inversion on the Y axis on the projection calculation.
246 * The default value is not inverted.
247 * @param[in] invertYAxis True if the Y axis should be inverted
249 void SetInvertYAxis(bool invertYAxis);
252 * @brief Get whether the Y axis is inverted.
254 * @return True if the Y axis is inverted, false otherwise
256 bool GetInvertYAxis();
259 * @brief Sets the default camera perspective projection for the given canvas size.
261 * Sets the near and far clipping planes, the field of view, the aspect ratio
262 * and the Z position of the actor based on the canvas size so that 1 unit in
263 * XY (z=0) plane is 1 pixel on screen.
265 * If the canvas size is ZERO, it sets the default camera perspective
266 * projection for the stage's size.
268 * @pre If size is non ZERO, \e width and \e height must be greater than zero.
270 * @param[in] size The canvas size.
272 void SetPerspectiveProjection( const Size& size );
275 * @brief Sets the camera projection to use orthographic projection.
277 * The XY plane is centered on the camera axis. The units in the X/Y
278 * plane directly equate to pixels on an equivalently sized
281 * The Z position of the actor, and the near and far clip planes of the
282 * bounding box match those that would be created by using
283 * SetPerspectiveProjection with the same size.
285 * @param[in] size Size of XY plane (normal to camera axis)
287 void SetOrthographicProjection( const Size& size );
290 * @brief Sets the camera projection to use orthographic projection with the given clip planes.
292 * This does not change the Z value of the camera actor.
294 * @param[in] left Distance to left clip plane (normal to camera axis)
295 * @param[in] right Distance to right clip plane (normal to camera axis)
296 * @param[in] top Distance to top clip plane (normal to camera axis)
297 * @param[in] bottom Distance to bottom clip plane (normal to camera axis)
298 * @param[in] near Distance to the near clip plane (along camera axis)
299 * @param[in] far Distance to the far clip plane (along camera axis)
301 void SetOrthographicProjection( float left, float right, float top, float bottom, float near, float far );
303 public: // Not intended for use by Application developers
305 * @brief This constructor is used by Dali New() methods.
307 * @param [in] actor A pointer to a newly allocated Dali resource
309 explicit DALI_INTERNAL CameraActor(Internal::CameraActor* actor);
314 #endif // __DALI_CAMERA_ACTOR_H__